Banner Length and Dimensional Calibration Laboratory

Banner Length and Dimensional Calibration Laboratory

Length and Dimensional Calibration Group (LDC), Reference Calibration Laboratory Center (RCLC)

Fig 4. The design of smart measuring probe (SMP)

Fig 5. Laser distance meter measuring bench 20 m

✨ 1. Significant Products:

The significant product developed is a Smart Measuring Probe (SMP) designed for calibration of Laser Distance Meters (LDM). It features:
• Automatic high-precision positioning (repeatability ±0.002 mm).
• Wireless DC motor control.
• Integration with interferometry system for reduced measurement uncertainty.
• Complies with ISO 16331-1:2012.
The SMP enables accurate, automated calibration of LDMs up to 20 meters, reducing human errors and ensuring traceability with measurement uncertainties as low as 0.64 mm.

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🏢 2. Responsibilities of Group:

• Developing and improving calibration systems for length measurement.
• Conducting research in advanced laser metrology.
• Providing calibration services for LDMs and other distance instruments.
• Supporting national metrology traceability and international standards compliance.

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🎯 3. Scope of Research Field:

• Laser distance metrology and calibration.
• Development of interferometry systems.
• Evaluation and reduction of measurement uncertainties.
• Smart automation for calibration instruments.
• Smart Measuring Probe: SMP

This intelligent probe is specially designed for LDM calibration system. The body is made of high grade aluminum (7075), the movement is controlled by high precision DC motor, wireless control, the control software is XAMPP, which can set the measuring points automatically and collect the data from CCD camera until all the calibration points are reached.

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🧪 4. Related Testing/Calibration:

• Laser Distance Meters Calibration base on ISO 16331-1 (2012).
• Calibration points (CP) up to 10CP (following ISO 16331-1 (2012).

• Laboratory conditions with
  Temperature 25 ±3°C
  Humidity 50 ±10%
  Target refectivity 95±5%
  Background illumination < 3000 lx

• Measurement uncertainties
  This measurement uncertainty evaluation based on M3003 (2012)
  Standard accuracy
  Dead path error of standard
  Resolution of standard
  Resolution of UUC
  Abbe error of measuring bench
  Abbe error of standard
  Cosine error of standard
  Cosine error of UUC
  Drift of standard
  Refractive index of air
  Zero positioning error of standard
  Temperature effect
  Deviation

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🥼 5. Testing Services:

Laser Distance Meter

• 0 m to 6 m *CMC 0.25 mm
• > 6 m to 10 m *CMC 0.36 mm
• > 10 m to 14 *CMC 0.50 mm
• > 14 m to 20 m *CMC 0.70 mm

Base on ISO 16331-1 : 2012
CMC = Calibration and Measurement Capability

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🔬 6. Key Scientific Instruments/Techniques:

• Smart Measuring Probe (SMP)
• Laser measurement system 5529A (He-Ne Laser 633 nm)
• CCD camera with data capture software (XAMPP-based)
• Calibration Bench up to 20 m

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🏆 7. Outstanding Achievements/Awards and Honors:

• Accredited with ISO/IEC 17025

• Developed one of the first automated LDM calibration systems in Thailan

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📄 8. Reference publications/Journal:

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☎️ 9. Contact Persons: